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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
// Keep in (case-insensitive) order:
#include "mozilla/PresShell.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/dom/SVGFEImageElement.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "nsContainerFrame.h"
#include "nsIFrame.h"
#include "nsGkAtoms.h"
#include "nsLiteralString.h"
using namespace mozilla::dom;
nsIFrame* NS_NewSVGFEImageFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGFEImageFrame final : public nsIFrame {
friend nsIFrame* ::NS_NewSVGFEImageFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
explicit SVGFEImageFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsIFrame(aStyle, aPresContext, kClassID) {
// This frame isn't actually displayed, but it contains an image and we want
// to use the nsImageLoadingContent machinery for managing images, which
// requires visibility tracking, so we enable visibility tracking and
// forcibly mark it visible below.
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
void Destroy(DestroyContext&) override;
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGFEImage"_ns, aResult);
nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
void OnVisibilityChange(
Visibility aNewVisibility,
const Maybe<OnNonvisible>& aNonvisibleAction = Nothing()) override;
bool ComputeCustomOverflow(OverflowAreas& aOverflowAreas) override {
// We don't maintain a ink overflow rect
return false;
} // namespace mozilla
nsIFrame* NS_NewSVGFEImageFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGFEImageFrame(aStyle, aPresShell->GetPresContext());
namespace mozilla {
/* virtual */
void SVGFEImageFrame::Destroy(DestroyContext& aContext) {
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
if (imageLoader) {
void SVGFEImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
"Trying to construct an SVGFEImageFrame for a "
"content element that doesn't support the right interfaces");
nsIFrame::Init(aContent, aParent, aPrevInFlow);
// We assume that feImage's are always visible.
// This call must happen before the FrameCreated. This is because the
// primary frame pointer on our content node isn't set until after this
// function ends, so there is no way for the resulting OnVisibilityChange
// notification to get a frame. FrameCreated has a workaround for this in
// that it passes our frame around so it can be accessed. OnVisibilityChange
// doesn't have that workaround.
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
if (imageLoader) {
nsresult SVGFEImageFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) {
SVGFEImageElement* element = static_cast<SVGFEImageElement*>(GetContent());
if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
"Observers observe the filter, so that's what we must invalidate");
return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
void SVGFEImageFrame::OnVisibilityChange(
Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
nsCOMPtr<nsIImageLoadingContent> imageLoader = do_QueryInterface(mContent);
if (imageLoader) {
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
nsIFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
} // namespace mozilla